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大陆边缘环境
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  continental marginal environment
     In conclusion, the data on petrology and elementary geochemistry indicate that Tuolugou cobalt-gold deposit mainly belong to sedimentary-exhalative genesis, and formed in the Sinian-Cambrian active continental marginal environment at the southern margin of Eastern Kunlun orogen.
     总之,岩(矿)相学及元素地球化学资料证明,驼路沟钴(金)矿床主要属喷气沉积矿床,形成于震旦-寒武纪东昆仑南缘的活动大陆边缘环境
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     Tectonic environment belongs to orogenic environment. The volcanic rocks may be formed in continental marginal environment, as a result of A-type subduction,brought a series of dextral rotation strick-slip fault zone,apetuer of rocks became larger, and emerged intense hot fluid,caused magma erupted to the earth's surface from these fault zone.
     喷出时的大地构造环境为陆内造山环境,该火山岩最初可能形成于大陆边缘环境,由于A型俯冲构造活动,测区乃至鄂拉山地区产生一系列右旋走滑断裂带,受NW向右旋走滑断裂的影响,岩石孔隙加大,并出现强烈的热流活动,导致岩浆沿这些断裂带喷出地表。
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  continental-margin environment
     Geochemical study shows that this kind of chert is characterized by lower SiO 2 (~80%),higher Al 2 O 3 (~10%)and lower V without significant negative Ce anomaly,which suggests that it formed in a continental-margin environment closely related to terrestrial material.
     地球化学研究发现,该硅质岩具有较低的SiO2(80%左右)和较高的Al2O3(10%左右),微量元素中V的含量也较低,稀土元素中不出现明显的Ce负异常,表明其形成于与陆源物质关系密切的大陆边缘环境
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  “大陆边缘环境”译为未确定词的双语例句
     In a series of discriminant diagram of cherts, the samples fall into the hydrothermal sedimentation field, showing that they are formed in a continental margin environment. Several ratio values of Fe/Ti,(Fe+Mn)/Ti, Al/(Al+Fe+Mn), MnO/TiO_2 and δ(Ce)also indicate the same characteristics.
     在判别硅质岩的形成与作用的一系列图解上, 样品均落在热水沉积作用和形成于大陆边缘环境的范围内, 这与一些特征值w(Fe) /w(Ti)、w(Fe+Mn) /w(Ti)、w(Al) /w(Al+Fe+Mn)、w(MnO) /w(TiO2 )、δ(Ce)等的分析结果相吻合。
短句来源
     Pyroxene is exclusively augite with high Na_2O, FeO and MnO contents, and plagioclase is low CaO andesine, which share characteristics with their counterparts from gabbros formed in an intra-plate setting and are largely different from those from gabbros associated with island arc or active continental margin.
     岩体主要矿物辉石属普通辉石,Na2O、FeO和MnO较高,长石属中长石,低CaO,这些特征明显区别于岛弧或活动大陆边缘环境中的同类矿物,而与板内伸展环境中形成的辉长岩的矿物特征相似.
短句来源
     The REE patterns and characteristics of REE parameters are similar to those of the graywacke deposited at the modern and ancient passive continental margin.
     稀土元素模式及其参数特征相似于现代的和古代的被动大陆边缘环境沉积的杂砂岩。
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     The forming environment belongs to near ridge and continental margin and the transform environment between them.
     产出的环境属于近洋脊与大陆边缘环境之间的过渡带。
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     (3)In the Early Cretaceous, the Suibin Depression was a continental margin setting, with a tectonic evolution from active setting, through stable setting to active setting.
     (3)绥滨坳陷早白垩世为大陆边缘环境,其构造演化过程为活动—稳定—活动。
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  相似匹配句对
     The sediment environment was in the passive continental margin.
     沉积环境为被动大陆边缘
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     Earthquakes along Continental Margins (An Overview)·
     大陆边缘地震
短句来源
     It is located in the rift of continental margin.
     大陆边缘裂谷带是矿床形成的大地构造环境
短句来源
     METALLOGENY OF CONTINENTAL MARGIN
     大陆边缘成矿
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     environment;
     环境;
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On the basis of emplaced tectonic setting of rock mass, rock association and geochemical characteristics the present authors divided basic and ultrabasic rocks from Hengduanshan region into following five types:(1) Rock mass emplaced in orogenic belts1. Ophiolites including Nujiang belt, Jinshajiang belt,Yushu-Litang belt,Changning-Menglian belt, and Ailaoshan belt.2. Yidun-type rock mass including Yidun belt, Deqin belt, and Luxi belt.3. Alaska-type rock mass including Lancangjiang belt, and Lixianjiang belt.(2)...

On the basis of emplaced tectonic setting of rock mass, rock association and geochemical characteristics the present authors divided basic and ultrabasic rocks from Hengduanshan region into following five types:(1) Rock mass emplaced in orogenic belts1. Ophiolites including Nujiang belt, Jinshajiang belt,Yushu-Litang belt,Changning-Menglian belt, and Ailaoshan belt.2. Yidun-type rock mass including Yidun belt, Deqin belt, and Luxi belt.3. Alaska-type rock mass including Lancangjiang belt, and Lixianjiang belt.(2) Rock mass emplaced in platform areas4. Small-sized and differentiated intrusions including Baosham Daxueshan belt, Jinpin belt, and Eryuan-Midu belt.5. Alkaline intrusions including East Erhai reck mass group from Dali City, and Zhuopan rock mass in Yongpin County.In general, rock masses emplaced in orogenic belt could be divided into two types in other way.The first one is ophiolite-type of bodies, which were normally emplaced into suture zone or adjacent area and represent oceanic crust (simatic crust) and upper mantle unit. The other is non-ophiolite-type of bodies which came from beneath continental crust(sialic crbst) consisting of Yidun-type and Al- aska-type bodies and other bodies.The present authors point out that Yidun-type bodies represent nen-ophiolitic Alpine-type bodies which were emplaced into orogenic belt by diapiric penetration being similar roughly to the subtype of continental crust belonging to the Alpine-type classified by Chidister and Cady (1972). Fetrclogically, although the Yidun-type of rock mass and ophiolite are similar each te other in many respects, they are also distinctly different in rook assemblages, emplaced tectonic setting and their contact relationsbip with country rocks.It is known that varic, us types of rock mass differ in characteristics of mineralization. In this regard it is very important to distinguish varicous types of basic and ultrabasie rocks that is quiet significant for studying ancient plate tectonic history, orogenic proccess and magmatism features.

根据岩石产出的构造环镜、岩石组合和地球化学特征,文中把横断山区的基性-超基性岩分为五类。其中分异的小侵入体和碱性岩体侵位于地台区,蛇绿岩、义敦型和阿拉斯加型浸位于造山带。蛇绿岩产于古缝合带或其附近。义敦型和阿拉斯加型则产于岛弧或活动大陆边缘环境,前者以变质橄榄岩为主,岩石富镁,后者不具变质组构,常呈环状分布,岩石富铁。不同类型的岩体有不同的构造意义,含矿性也明显不同。

Shiniushan is situated in the east Fujian. Its area is about 600 sqare kilometers with an elliptical figure in plane, The ring-like and radiate faults and veins filled in the faults appear in the area around it, In the middle a volcanic-sedimentary strata with a thickness of more than 1 200 meters can be found, It is a typical caldera of Late Cretaceous in east Fujian. The volcanic rocks are medioacidity to acidulous alkalinity. They are classified into the high potassium calc-alkaline series in Owen Category....

Shiniushan is situated in the east Fujian. Its area is about 600 sqare kilometers with an elliptical figure in plane, The ring-like and radiate faults and veins filled in the faults appear in the area around it, In the middle a volcanic-sedimentary strata with a thickness of more than 1 200 meters can be found, It is a typical caldera of Late Cretaceous in east Fujian. The volcanic rocks are medioacidity to acidulous alkalinity. They are classified into the high potassium calc-alkaline series in Owen Category. According to its Sr initial ratio the original magma may be the mixed with mantle and crustal materials. The initial composition of this magma is dacitic. The Gottinni-Rittman diagram shows that the volcanic rocks in this area is the product of late orogenic magmatic along active continental margin. The rare aerth partition curves show strong Eu negative anomaly. There for it is considered that this magma has the same process of differentiation and evolution as the Miarolitic Granite and has the tendency developing from medio-acidity to acidulous alkal linity.

石牛山位于福建的东部,其平面呈椭园形,面积约600平方公里,四周为环状、放射状断裂与充填其中的岩墙和岩脉。中部堆积的火山喷发-沉积岩系,厚度达1200米以上,它是福建东部一个具代表性的晚白垩世破火山口。火山岩为中酸-酸偏碱性,属于欧文(1964)分类的高钾钙碱系列。从锶的初始比值,可知其原始岩浆属于幔壳混源型,原始成份为英安质岩浆。火山岩戈蒂里-里特曼指数图解,说明本区火山岩是活动大陆边缘环境中的造山晚期岩浆活动的产物。从岩石稀土分布模式、铕亏损明显等说明岩浆经历了与晶洞花岗岩相似的分异和演化,具有由中酸性向酸偏碱性演化的趋势。

The study of petrology, major element, geochemistry and REE patterns shows that graywacke in western Fujian belongs to typical quartz-rich graywacke. The high content of stable clastic quartz and strong depletion of unstable clastic feldspar and rock fragments suggest the recyclicity of sediments. The major element geochemical analysis reveals a very high SiO_2 content and depletion of CaO and Na_20. It is similar to graywacke deposited at the passive continental margin in low ratios of Fe_2O_3+MgO and Al_2O_3/SiO_2...

The study of petrology, major element, geochemistry and REE patterns shows that graywacke in western Fujian belongs to typical quartz-rich graywacke. The high content of stable clastic quartz and strong depletion of unstable clastic feldspar and rock fragments suggest the recyclicity of sediments. The major element geochemical analysis reveals a very high SiO_2 content and depletion of CaO and Na_20. It is similar to graywacke deposited at the passive continental margin in low ratios of Fe_2O_3+MgO and Al_2O_3/SiO_2 and a low TiO_2 content and greatly varied high K_2O/Na_2O and Al_2O_3/(CaO+Na_2O). The REE patterns and characteristics of REE parameters are similar to those of the graywacke deposited at the modern and ancient passive continental margin.A series of synthetic analyses show that the protolith of the early Paleozoic graywacke in western Fujian is composed of a mixture of mainly sedimentry rocks and low-grade metamorphic rocks and intermediate-acid igneous rocks. The tectonic setting is the tectonically inactive passive continental margin or the back-arc basin.

福建西部早古生代杂砂岩属富石英杂砂岩类。稳定碎屑石英的高含量和不稳定碎屑长石、岩屑的强烈贫化,表现了沉积物具再旋回特点。很高的SiO_2含量及CaO、Na_2O的贫化,并以低的Fe_2O_3+MgO、Al_2O_3/SiO_2、TiO_2和高的变化极大的K_2O/Na_2O、Al_2O_3/(CaO+Na_2O)与被动大陆边缘沉积的杂砂岩相类似。稀土元素模式及其参数特征相似于现代的和古代的被动大陆边缘环境沉积的杂砂岩。分析表明,本套杂砂岩的源岩是以沉积岩、浅变质岩为主和中—酸性火成岩混合组成,所处的大地构造背景为构造上不活动的被动大陆边缘或弧后盆地环境。

 
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